deepdiff

delta, equal := evendeep.DeepDiff([]int{3, 0, 9}, []int{9, 3, 0}, diff.WithSliceOrderedComparison(true))
t.Logf("delta: %v", delta) // ""
 
delta, equal := evendeep.DeepDiff([]int{3, 0}, []int{9, 3, 0}, diff.WithSliceOrderedComparison(true))
t.Logf("delta: %v", delta) // "added: [0] = 9\n"
 
delta, equal := evendeep.DeepDiff([]int{3, 0}, []int{9, 3, 0})
t.Logf("delta: %v", delta)
// Outputs:
//   added: [2] = <zero>
//   modified: [0] = 9 (int) (Old: 3)
//   modified: [1] = 3 (int) (Old: <zero>)

type timeComparer struct{}
 
func (c *timeComparer) Match(typ reflect.Type) bool {
  return typ.String() == "time.Time"
}
 
func (c *timeComparer) Equal(ctx Context, lhs, rhs reflect.Value, path Path) (equal bool) {
  aTime := lhs.Interface().(time.Time)
  bTime := rhs.Interface().(time.Time)
  if equal = aTime.Equal(bTime); !equal {
    ctx.PutModified(ctx.PutPath(path), Update{Old: aTime.String(), New: bTime.String(), Typ: typfmtlite(&lhs)})
  }
  return
}